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Dear Doug,
In addition to t and p-value, I would like to report the beta coefficient of the fixed effects in the following regression equation for the vertex showing the max statistic within the cluster that survived multiple comparison correction:
y = β0 + β1*sex + β2*age + β3*(sex+age) + e
I know that beta.mgh contains the beta estimates corresponding to the intercepts of male and female and the slopes of age for each sex. However, what I need is the beta corresponding to the intercept (β0), and the beta for the slope of sex (β1), age (β2) and sex*age interaction (β3). I also need the residual variance of the model (e), but rvar.mgh contains 4 values, 2 for the intercepts and another two for the slopes. I would really appreciate if you could help me to obtain this information.
Thanks a lot in advance
Marina